DopplerFX® Accessory Board

This revolutionary accessory for our ShockWave 3 sound system provides enhanced Doppler Shift effects. In conjunction with the ShockWave 3 sound module, the DopplerFX board can make a model airplane sound as though it is going as fast as Mach 0.5 (384 mph or 616km/hr)!

What's New:

September 07, 2023

New 5.1.2b firmware release enables scrolling through available sound sets remotely from your radio.

July 03, 2023

New B1B Lancer four engined bomber sound set added bringing our total airplane sound sets to 126.

January 10, 2023

Beechcraft KingAir B350 - B200 sound set added bringing our total airplane sound sets to 125.

February 15, 2022

New Learjet 35-70 executive jet sound set added bringing our total airplane sound sets
to 123.

DopplerFX Accessory Board With Mounting Case

Name : DopplerFX With Case
Item Number : DopplerFX1
Dimensions : 56mm x 29mm x 13mm
                     (2.2" x 1.14" x 0.51")
Weight : 18 grams (0.6oz)

1 x 4 wire 270mm long connecting cable
1 x 2cm x 5cm hook and loop fastener patch
1 x printed 4-page quick-start guide

DopplerFX Quick-Start guide available here

DopplerFX Manual available here

Hear our DopplerFX Demonstration Audio here.


This DopplerFX board is absolutely unique in the RC world.

In summary, in conjunction with the ShockWave 3 sound module, this board produces enhanced Doppler Frequency Shift effects so that when the model is approaching towards, or receding from, the RC operator, it sounds much faster than it is really going.

The model will exhibit a mild Doppler frequency shift due to its own motion, but because the model's speed is much slower than the real airplane, this Doppler shift effect is quite mild. Our ShockWave 3 sound module allows the modeller to set a model speed multiplication factor, up to 7 times, by editing a simple DopplerFXsettings.txt text file on the ShockWave 3's microSD card.

If your model is flying at 50km/hr it can be made to sound as though it is flying at 350km/hr - Wow! A maximum simulated model speed of 385.26mph (616.42km/hr or Mach 0.5) is possible!

The "start point" or "Observer Position" can be set remotely from the RC transmitter so that it can be set to near the judges location, for example, in a scale flying competition.

DopplerFX® is a trade mark of Model Sounds Inc. registered with the U.S. Patent and Trademark Office (USPTO).